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ClinicalTrials.gov public records Last synced Oct 13, 2026, 4:28 PM EDT

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Showing 169–192 of 368 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Ascorbic Acid (Vitamin C) Clear all
Not listed No phase listed Observational Accepts healthy volunteers

Observational Study on the Use of Ivermectin as an Outpatient Treatment Option for COVID-19

NCT05045937
View directory record Official record
Conditions
Covid19, COVID-19 Pneumonia, COVID-19 Respiratory Infection, COVID-19 Acute Bronchitis
Interventions
Ivermectin
Drug
Lead sponsor
Patrick Robinson
Other
Eligibility
12 Years to 110 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
San Antonio, Florida
Source: ClinicalTrials.gov public record
Updated Apr 27, 2022 · Synced Oct 13, 2026, 4:28 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Vascular Function and Oxidative Stress in Emergency Medical Responders

NCT06985394
View directory record Official record
Conditions
Cardiovascular Function in EMTs
Interventions
Antioxidant cocktail, Placebo
Dietary Supplement
Lead sponsor
University of Delaware
Other
Eligibility
20 Years to 40 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated May 22, 2025 · Synced Oct 13, 2026, 4:28 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Iron Bioavailability From Cereal-based Foods

NCT05061290
View directory record Official record
Conditions
Iron Bioavailability
Interventions
Control Porridge, Reference Porridge A, Test Porridge B, Test Porridge C, Test Porridge D
Other
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 28, 2022 · Synced Oct 13, 2026, 4:28 PM EDT
Completed No phase listed Observational

Outcomes of Septic Shock Patients Treated With a Metabolic Resuscitation Bundle Consisting of Intravenous Hydrocortisone, Ascorbic Acid and Thiamine.

NCT03913468
View directory record Official record
Conditions
Septic Shock, Ascorbic Acid Deficiency
Interventions
Intravenous Ascorbic Acid
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 90 Years
Enrollment
206 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 14, 2021 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Placebo-Controlled Study Assessing the Use of a Novel Exfoliative Serum With A Chemical Peel to Improve Photodamage in Adults

NCT05908825
View directory record Official record
Conditions
Photodamaged Skin
Interventions
Vitamin C with AHA Exfoliative Serum, Placebo serum
Drug
Lead sponsor
Austin Institute for Clinical Research
Network
Eligibility
30 Years to 65 Years · Female only
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Pflugerville, Texas
Source: ClinicalTrials.gov public record
Updated Jul 19, 2024 · Synced Oct 13, 2026, 4:28 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

HAT for the Treatment of Sepsis Associated With NASTI

NCT05157360
View directory record Official record
Conditions
Necrotizing Soft Tissue Infection, Sepsis
Interventions
HAT, Placebo
Drug
Lead sponsor
Ascension Health
Industry
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Wichita, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 24, 2024 · Synced Oct 13, 2026, 4:28 PM EDT
Approved For Marketing No phase listed Expanded access

Treatment on HBeAg Positive or HBeAg Negative in Chronic Hepatitis B

NCT01198860
View directory record Official record
Conditions
CHRONIC HEPATITIS B
Interventions
CTH Chronic Hepatitis B
Drug
Lead sponsor
Nguyen Thi Trieu, MD
Individual
Eligibility
18 Years to 60 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin C Enriched Hydrolyzed Collagen, PrimaColl™, Whey Protein, or Placebo on Collagen Synthesis

NCT05427279
View directory record Official record
Conditions
Effect of Food Supplement
Interventions
Placebo, Hydrolized Collagen, PrimaColl, Whey protein
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 8, 2026 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Composition for Treating Cirrhosis and Liver Cancer (SB-1121)

NCT05178303
View directory record Official record
Conditions
Cirrhosis of the Liver
Interventions
SB-1121(1), SB-1121(2)
Drug
Lead sponsor
Nguyen Thi Trieu, MD
Individual
Eligibility
18 Years to 80 Years
Enrollment
134 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated May 16, 2025 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Early Phase 1 Interventional Results available

Ascorbic Acid and Combination Chemotherapy in Treating Patients With Locally Advanced or Recurrent Pancreatic Cancer That Cannot Be Removed by Surgery

NCT02896907
View directory record Official record
Conditions
Pancreatic Adenocarcinoma, Recurrent Pancreatic Carcinoma, Stage III Pancreatic Cancer, Stage IV Pancreatic Cancer, Unresectable Pancreatic Carcinoma
Interventions
Oxaliplatin, Irinotecan Hydrochloride, Leucovorin Calcium, Fluorouracil, Ascorbic Acid
Drug · Dietary Supplement
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Thomas Jefferson University
Other
Eligibility
18 Years to 75 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 30, 2025 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gelatin, Collagen, Gummy and PINP

NCT03357432
View directory record Official record
Conditions
Collagen Synthesis
Interventions
gelatin, collagen, gummy dose
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Nov 9, 2018 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Nitric Oxide Supplementation Product on Endothelial Dysfunction and Prehypertensive Adults

NCT03895749
View directory record Official record
Conditions
Hypertension
Interventions
NEO40 Daily
Dietary Supplement
Lead sponsor
Hypertension Institute, Nashville
Other
Eligibility
18 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 30, 2019 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment of a Pre-Workout Dietary Supplement

NCT02952014
View directory record Official record
Conditions
Dietary Modification
Interventions
C4 Extreme, C4 Extreme (without Advantra Z, Placebo
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 40 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Nov 2, 2016 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 1 Interventional

Nitrite Infusion Studies

NCT00102271
View directory record Official record
Conditions
Healthy
Interventions
Oxypurinol, Sodium Nitrite
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
21 Years to 40 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Not applicable Interventional

A 12-week Pilot Nutrition Intervention for Children With New Diagnosis of Stage 3 Type 1 Diabetes (T1D)

NCT06640478
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
NUTRI-Beta Counseling, Standard dietary counseling, Free weekly produce foods
Other · Dietary Supplement
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
6 Years to 17 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
2
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 1 Interventional

The Physiological Responses and Adaptation of Brown Adipose Tissue to Chronic Treatment With Beta3-Adrenergic Receptor Agonists

NCT03049462
View directory record Official record
Conditions
Polycystic Ovary Syndrome
Interventions
Mirabegron, B Complex Plus Vitamin C Tablets
Drug · Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 40 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 9, 2026 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Obesity, Inflammation and Oxidative Stress

NCT01028976
View directory record Official record
Conditions
C-reactive Protein, Inflammation, Obesity, Oxidative Stress
Interventions
Vitamin C (ascorbic acid), Placebo tablet
Dietary Supplement
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years and older
Enrollment
512 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Oct 13, 2026, 4:28 PM EDT
Withdrawn Phase 2 Interventional

Study of High Dose Intravenous (IV) Ascorbic Acid in Measurable Solid Tumor Disease

NCT01125449
View directory record Official record
Conditions
Sarcoma, Adenocarcinoma, Carcinoma, Multiple Myeloma, Desmoplastic Small Round Cell Tumor
Interventions
Ascorbic acid (vitamin C)
Drug
Lead sponsor
Situs Cancer Research Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Rogers, Arkansas
Source: ClinicalTrials.gov public record
Updated May 18, 2025 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Proof of Mechanism Study to Evaluate Binding of Alfa-synuclein

NCT05274568
View directory record Official record
Conditions
Parkinson Disease, Multisystem Atrophy, Healthy Volunteer
Interventions
[18F]UCB-2897
Drug
Lead sponsor
Invicro
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Oct 13, 2026, 4:28 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Renal Metabolism of Glycolate to Oxalate

NCT04437225
View directory record Official record
Conditions
Healthy
Interventions
Low oxalate controlled Diet, Primed, continuous intravenous infusion of 13C2-Glycolate, Bolus intravenous infusion of 13C2-Glycolate, Oral bolus administration of 13C2-Glycolate
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Oct 13, 2026, 4:28 PM EDT
Completed No phase listed Observational

Screening Tests in Detecting Colorectal Cancer

NCT00025025
View directory record Official record
Conditions
Colorectal Cancer
Interventions
sample testing
Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
65 Years to 80 Years
Enrollment
4,482 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
65
States / cities
Tuscon, Arizona • Oakland, California • Aurora, Colorado + 38 more
Source: ClinicalTrials.gov public record
Updated Jul 4, 2016 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 2 Interventional Results available

Pharmacological Ascorbate for Lung Cancer

NCT02420314
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
Paclitaxel, Carboplatin, Ascorbic Acid
Drug
Lead sponsor
Joseph J. Cullen, MD, FACS
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Aug 20, 2024 · Synced Oct 13, 2026, 4:28 PM EDT
Suspended Phase 3 Interventional

VItamin C in Thermal injuRY: The VICToRY Trial

NCT04138394
View directory record Official record
Conditions
Shock, Thermal Burn
Interventions
Ascorbic Acid, placebo
Drug
Lead sponsor
Clinical Evaluation Research Unit at Kingston General Hospital
Other
Eligibility
18 Years and older
Enrollment
666 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
10
States / cities
Phoenix, Arizona • Bridgeport, Connecticut • Washington D.C., District of Columbia + 7 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Oct 13, 2026, 4:28 PM EDT
Completed Phase 2 Interventional Results available

Vitamin C Infusion for TReatment in Sepsis and Alcoholic Hepatitis

NCT03829683
View directory record Official record
Conditions
Alcoholic Hepatitis, Sepsis
Interventions
Vitamin C, Dextrose 5% in water
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 28, 2023 · Synced Oct 13, 2026, 4:28 PM EDT